CN1029746C - Process for one-stage electrolytic extraction of copper - Google Patents
Process for one-stage electrolytic extraction of copper Download PDFInfo
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- CN1029746C CN1029746C CN93109250A CN93109250A CN1029746C CN 1029746 C CN1029746 C CN 1029746C CN 93109250 A CN93109250 A CN 93109250A CN 93109250 A CN93109250 A CN 93109250A CN 1029746 C CN1029746 C CN 1029746C
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- copper
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Electrolytic Production Of Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a method for electrolytically extracting refined copper whose purity is more than 99.9% from copper oxide ore whose copper content is more than 2%. The method improves the defects of the prior art of copper preparation by smelting and electrolysis in a wet method, adds the step for removing iron before acid leaching, and adjusts the technological parameters of the electrolysis. The current efficiency and the purity of copper products are increased, and the present invention has the advantages of simple technological process, no pollution and low cost.
Description
The invention belongs to electrolytic process and prepare the technical field of metallic copper, this method begins to handle from oxidized ore, and the product that obtains through electrolysis is smart copper.
The method of copper metallurgy at present is divided into pyrogenic process and wet method.Wet type copper smelting is the technology that RECENT DEVELOPMENTS is got up, and it is mainly to handle copper oxide ore.Wet type copper smelting mainly contains following several technology at present:
(1) ore-fragmentation-levigate-flotation-concentrate half acidizing fired-acidleach-purification-electrolysis-electrolytic copper.
(2) ore-fragmentation-acidleach-extraction concentrates-electrolysis-smart copper.
(3) ore-fragmentation-acidleach-purification-electrolysis-smart copper.
Also have many technologies in addition, such as after the acidleach with methods such as iron displacements, but these methods obtain be blister copper, also must just can obtain the smart copper of electrolysis through electrorefining after the pyrorefining.For technology (1), not only technical process complexity, scale of investment big (relating to two steps of flotation and roasting), pollution when acidizing fired (complete put sulfur dioxide gas) is arranged, and current efficiency is low, is generally 70-80%.For technology (2), relate to extraction and concentrate a step, investment cost height, and product purity not enough (99.75～99.90%), but this technology has been removed impurity iron (removing during extraction), so current efficiency increases.For technology (3) (" copper extracts metallurgical "), the 626th page), its flow process is simple, less investment, current efficiency is low, the problem of product purity not enough (99.75～99.9%) but also exist.
The objective of the invention is to deficiency at wet type copper smelting technology (3), by to whole process flow rearrange and to the adjustment of processing parameter, improved current efficiency (93%, more than) and product purity (more than 99.95%), and have that technology is simple, less investment, free of contamination advantage.
The inventor thinks that through theoretical investigation the basic reason that current efficiency is low is an iron-holder height in the electrolytic solution at the low and low shortcoming of product purity of current efficiency of technology (3).Technology of the present invention has increased the processing step of deironing and has matched with the electrolytic parameter of corresponding change on the basis of former technology (3), reached the purpose that improves Faradaic current efficient; And being lead anode, the not enough basic reason of product purity in electrolytic process, is oxidized to plumbic oxide, generate lead sulfate then, this solid particulate comes off from lead electrode on a small quantity, and taken near the negative electrode by the solution of convection current (the strong convection current of solution that the anode oxygen of emitting causes) and attached on the negative electrode, thereby the content that makes plumbous impurity in the product is considerably beyond electrolytic copper standard (0.005%), and finally makes product purity not enough.The present invention has reduced the solution convection current by adjusting the way of interpole gap and electrolytic parameter, has reduced plumbous twisting cohesion and adhering on negative electrode, has reached the purpose that improves product purity.Based on above-mentioned theory research, the inventor goes out following technical process through research and design, can begin to handle from copper oxide ore, need not further purification, just can obtain purity and be higher than 99.9% smart copper products.
Be that specifying of smart copper produced in single stage method electrolysis of the present invention below.The technical process that smart copper is produced in single stage method electrolysis of the present invention is:
Ore-fragmentation-deironing-acidleach-purification-electrolysis-electrolytic copper product.
The ore jaw of copper oxide ore (cupric 2%) is broken about 30mm, be crushed to below the 8mm through pulverizer again, through sieving (preferably below the 2mm) below the 4mm, use the magnetic method deironing with what processing step of the present invention increased newly again, the content that makes iron wherein is less than 2%, and then, purify after 24 hours, with supernatant liquor (CuSO through carrying out acidleach at the vitriol oil of 40～80g/l with concentration
4Content is more than 30g/l) be incorporated into electrolytic tank electrolysis, dregs are abandoned it after washing several times.Under following processing condition, carry out at last electrolysis:
Electrode: anode/Pb, negative electrode/copper sheet
Current density: D
A=50～200A/m
2
Preferred 80～120mA/m
2
Gelatin: 60～120mg/l
Preferably: 70～100mg/l
NaCl：15～40mg/l
Preferably: 20～30g/l
Temperature: 30～60 ℃
All the other processing parameters are identical with the processing parameter of general electrolytic copper.
Adopt above-mentioned technical process and parameter electrowinning copper, the current efficiency when this copper-extracting process step has (1) its electrolysis reaches more than 90%; (2) product purity generally can reach more than 99.95% more than 99.9%; (3) foreign matter content meets the electrolytic copper standard, and especially lead content is less than 0.005%; (4) circulation of elecrolyte is used, and does not pollute.
Be a specific embodiment of the present invention below:
Copper content at 2.5% cupric oxide ore, after above-mentioned fragmentation, deironing, acidleach, purification, is carried out electrolysis, and anode is that plumbous, negative electrode is a copper sheet, current density d
A=100A/m
2, gelatin 100mg/l, NaCl35mg/l carries out electrolysis under 45 ℃ of the temperature.Products obtained therefrom result such as table 1, current efficiency 93%.
(table 1 is seen the literary composition back)
By as seen above-mentioned, single stage method of the present invention is extracted the technology of smart copper, established the iron removal by magnetic separation step before the acidleach and aligned electrolytic processing parameter owing in former technical process arrangement, increase, overcome the low and low shortcoming of product purity of current rate in the existing technical process, need not further refining just can one the step obtain purity at the smart copper more than 99.95%, this technology also has that technical process is short, pollution-free, energy-saving advantages in addition.
Table 1 electrolytic copper result of laboratory test (weight percentage)
Element copper-lead zinc-iron sulphur nickel tin antimony bismuth total impurities
Sample 99.96 0.0015 0.0045 0.0003 0.006 0.0096
0.0004 0.001 0.001 0.0003
International 99.95 0.005 0.005 0.0003 0.002 0.028
(copper) 0.005 0.005 0.002 0.002
Claims (6)
1, a kind of method from the smart copper of the copper oxide ore electrowinning of copper content more than 2% is characterized in that this method is made up of following technical process:
(a). the cupric oxide ore more than 2% is crushed to below the 4mm;
(b) use the magnetic method deironing;
(c) powder after the magnetic separation is carried out acidleach with the vitriol oil, purify 24 hours, then
(d) electrolysis supernatant liquor, its anode are plumbous, and negative electrode is a copper sheet;
Current density Da=50-200a/m
2, gelatin 60-100mg/l, sodium-chlor 15-40mg/l, temperature 30-60 ℃, all the other parameters are identical with common process.
2, the described method of claim 1 is characterized in that in the described step (a) cupric oxide ore being crushed to below the 1mm.
3, the described method of claim 1 is characterized in that in the described step (b), and after the magnetic method deironing, the content that makes iron is less than 2%.
4, the described method of claim 1 is characterized in that in the described step (c), this is 40-80mg/l with dense stream acid concentration.
5, this method of stating of claim 1 is characterized in that this states in the step (d), and current density is da=80-120A/m
2, gelatin 70-100mg/l, temperature is 40 ℃.
6, the smart copper that makes according to the described method of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93109250A CN1029746C (en) | 1993-08-10 | 1993-08-10 | Process for one-stage electrolytic extraction of copper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93109250A CN1029746C (en) | 1993-08-10 | 1993-08-10 | Process for one-stage electrolytic extraction of copper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1084585A CN1084585A (en) | 1994-03-30 |
| CN1029746C true CN1029746C (en) | 1995-09-13 |
Family
ID=4987570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93109250A Expired - Fee Related CN1029746C (en) | 1993-08-10 | 1993-08-10 | Process for one-stage electrolytic extraction of copper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1029746C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031379A (en) * | 2010-12-14 | 2011-04-27 | 东营方圆有色金属有限公司 | Electro-deposition treatment process for copper separation solution |
| DE102011013449B4 (en) | 2011-03-09 | 2013-12-05 | Continental Automotive Gmbh | Assembly with a carrier, an SMD component and a stamped grid part |
| CN102952941B (en) * | 2012-04-01 | 2016-02-24 | 东北大学 | A kind of method utilizing copper oxide ore |
| CN102732720B (en) * | 2012-04-01 | 2016-02-24 | 东北大学 | A kind of method processing copper oxide ore |
| CN103194769B (en) * | 2013-04-22 | 2016-02-17 | 北京工业大学 | A kind of electrolyzer and method thereof reclaiming high purity copper from discarded circuit board |
| CN103498051B (en) * | 2013-09-30 | 2015-01-28 | 昆明理工大学 | Method for recovering copper and nickel from nickel-iron-copper alloy waste |
| CN104232924B (en) * | 2014-09-25 | 2016-07-06 | 河南工信环保科技有限公司 | A kind of Copper Ores acid leaching liquor carry copper method for removing iron |
| WO2016082051A1 (en) * | 2014-11-28 | 2016-06-02 | Proter S.A. | Direct electrowinning process with leaching solution |
| CN111197171A (en) * | 2020-02-18 | 2020-05-26 | 华建彬 | Wet copper extraction process |
| CN113096884A (en) * | 2021-04-01 | 2021-07-09 | 江西中晟金属有限公司 | Preparation method of high-purity copper bar |
-
1993
- 1993-08-10 CN CN93109250A patent/CN1029746C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1084585A (en) | 1994-03-30 |
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